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[Xen-users] Make both CPUs available to Dom0

To: xen-users@xxxxxxxxxxxxxxxxxxx
Subject: [Xen-users] Make both CPUs available to Dom0
From: Andrej Radonic <andrej.radonic@xxxxxxxx>
Date: Wed, 03 May 2006 22:08:46 +0200
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Hello,

it's my first time with Xen on a dual processor machine. Everything was fine until I decided to assign 1 VCPU to Dom0 and pin it to CPU 1. Since then Domain-0 only sees 1 CPU and no vcpu-set / vcpu-pin seems to be able to get it back. When I boot the plain vanilla FC5 SMP kernel then both CPUs are there. I must be missing something obvious (and probably did something really stupid) so please be kind with me...

Thanks for your help!
Cheers,
Andrej

Diagnostical info:

xm list --long

(domain
   (domid 0)
   (uuid 00000000-0000-0000-0000-000000000000)
   (ssidref 0)
   (vcpus 2)
   (vcpu_avail 7)
   (cpu_weight 1.0)
   (memory 454)
   (maxmem 454)
   (name Domain-0)
   (on_poweroff destroy)
   (on_reboot restart)
   (on_crash restart)
   (state r-----)
   (shutdown_reason poweroff)
   (cpu_time 2629.21563207)
   (online_vcpus 1)
)


root@vt ~]# grep cpu /etc/xen/xend-config.sxp
(dom0-cpus 0)

[root@vt ~]# xm info
system                 : Linux
host                   : vt.lan.intersales.de
release                : 2.6.16-1.2096_FC5xen0
version                : #1 SMP Wed Apr 19 05:49:52 EDT 2006
machine                : i686
nr_cpus                : 1
nr_nodes               : 1
sockets_per_node       : 1
cores_per_socket       : 1
threads_per_core       : 1
cpu_mhz                : 2799
hw_caps : bfebfbff:20100000:00000000:00000180:0000e4bd:00000000:00000001
total_memory           : 503
free_memory            : 30
xen_major              : 3
xen_minor              : 0
xen_extra              : .0
xen_caps               : xen-3.0-x86_32 hvm-3.0-x86_32
platform_params        : virt_start=0xfc000000
xen_changeset          : unavailable
cc_compiler            : gcc version 4.1.0 20060304 (Red Hat 4.1.0-3)
cc_compile_by          : bhcompile
cc_compile_domain      : build.redhat.com
cc_compile_date        : Wed Apr 19 05:11:40 EDT 2006


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